.ubload_online_button {position: relative;
    display: block;
    cursor: pointer;
}

.btn-loader {
    display: none;
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.8);
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.btn-loader.active {
    display: flex;
}

.btn-loader .spinner-border {
    width: 16px;
    height: 16px;
    border-width: 2px;
}